it's an ongoing back and forth. >> if jimmy carter goes and brings home kenneth bae. thanks very much. >>> american captives, nuclear threats, taunting the united states. north korea under kim jong un has many similarities to the days when his father and grandfather ruled that country. in many ways, the nation is fixated on the past. ivan watson is inside north korea and filed this report. >> reporter: north korea is probably the only country in the world that organizers are dedicated to two flowers, red and purple blossoms. named after two former rulers of the country, north korea's founder, kim il sung and his son kim jong il. >> when you look at this, reflections of our leaders. >> north koreans are taught quite literally to worship their leaders, bowing before the palace that is the final resting place of both father and son. for visitors to this strictly disciplined militaristic society, it's good to be reminded that children still love the little things in life. >> who has roller blades? >> reporter: but ask a 12-year-old what's his favorite tv show, and he answ